Long-Range Proton Conduction across Free-Standing Serum Albumin Mats

Amdursky, Nadav; Wang, Xuhua; Meredith, Paul; C., Donal D.; Stevens, Molly M.

doi:10.1002/adma.201505337

Journal article 1007 views 141 downloads

Long-Range Proton Conduction across Free-Standing Serum Albumin Mats

Nadav Amdursky, Xuhua Wang, Paul Meredith

, Donal D. C. Bradley, Molly M. Stevens

Advanced Materials, Volume: 28, Issue: 14, Pages: 2692 - 2698

Swansea University Author: Paul Meredith

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DOI (Published version): 10.1002/adma.201505337

Abstract

Proton conductors are commonly used in a variety of applications, mainly in fuel-cells and batteries. While all of the proton-conducting materials in these applications are inorganic or organic, there is great scientific effort to expand the breadth of proton-conducting materials to biologically-der...

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Published in:	Advanced Materials
ISSN:	09359648
Published:	2016
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa34067
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first_indexed	2017-05-31T20:12:51Z
last_indexed	2019-08-15T20:41:39Z
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spelling	2019-08-15T17:17:44.9682298 v2 34067 2017-05-31 Long-Range Proton Conduction across Free-Standing Serum Albumin Mats 31e8fe57fa180d418afd48c3af280c2e 0000-0002-9049-7414 Paul Meredith Paul Meredith true false 2017-05-31 SPH Proton conductors are commonly used in a variety of applications, mainly in fuel-cells and batteries. While all of the proton-conducting materials in these applications are inorganic or organic, there is great scientific effort to expand the breadth of proton-conducting materials to biologically-derived materials. Here, we explore proton conductivity across free-standing mats composed of bovine serum albumin, one of the cheapest commercially available proteins. We examine both photo-induced proton transfer and long-range (millimetre length-scale) proton conductivity along the mat. Our results, together with temperature dependent and isotope effect measurements, demonstrate that oxo-amino-acids of the protein have a major role in their ability to translocate protons. We further discuss our results in the context of the ‘over-the-barrier’ proton hopping mechanism, which distinguishes them from the common pro-ton hopping mechanism across water. The use of cheap proton-conducting free-standing protein mats opens new possibilities for various types of applications including those in the emergent field of bioelectronics where biocompatible materials capable of transducing ion and electron currents are required. Journal Article Advanced Materials 28 14 2692 2698 09359648 3 2 2016 2016-02-03 10.1002/adma.201505337 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University 2019-08-15T17:17:44.9682298 2017-05-31T15:31:35.3330641 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Nadav Amdursky 1 Xuhua Wang 2 Paul Meredith 0000-0002-9049-7414 3 Donal D. C. Bradley 4 Molly M. Stevens 5 0034067-26072017122439.pdf MeredithVOR.pdf 2017-07-26T12:24:39.4330000 Output 1017570 application/pdf Version of Record true 2017-07-26T00:00:00.0000000 Released under the terms of a Creative Commons Attribution License (CC-BY). true eng
title	Long-Range Proton Conduction across Free-Standing Serum Albumin Mats
spellingShingle	Long-Range Proton Conduction across Free-Standing Serum Albumin Mats Paul Meredith
title_short	Long-Range Proton Conduction across Free-Standing Serum Albumin Mats
title_full	Long-Range Proton Conduction across Free-Standing Serum Albumin Mats
title_fullStr	Long-Range Proton Conduction across Free-Standing Serum Albumin Mats
title_full_unstemmed	Long-Range Proton Conduction across Free-Standing Serum Albumin Mats
title_sort	Long-Range Proton Conduction across Free-Standing Serum Albumin Mats
author_id_str_mv	31e8fe57fa180d418afd48c3af280c2e
author_id_fullname_str_mv	31e8fe57fa180d418afd48c3af280c2e_***_Paul Meredith
author	Paul Meredith
author2	Nadav Amdursky Xuhua Wang Paul Meredith Donal D. C. Bradley Molly M. Stevens
format	Journal article
container_title	Advanced Materials
container_volume	28
container_issue	14
container_start_page	2692
publishDate	2016
institution	Swansea University
issn	09359648
doi_str_mv	10.1002/adma.201505337
college_str	Faculty of Science and Engineering
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hierarchy_top_id	facultyofscienceandengineering
hierarchy_top_title	Faculty of Science and Engineering
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department_str	School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
document_store_str	1
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description	Proton conductors are commonly used in a variety of applications, mainly in fuel-cells and batteries. While all of the proton-conducting materials in these applications are inorganic or organic, there is great scientific effort to expand the breadth of proton-conducting materials to biologically-derived materials. Here, we explore proton conductivity across free-standing mats composed of bovine serum albumin, one of the cheapest commercially available proteins. We examine both photo-induced proton transfer and long-range (millimetre length-scale) proton conductivity along the mat. Our results, together with temperature dependent and isotope effect measurements, demonstrate that oxo-amino-acids of the protein have a major role in their ability to translocate protons. We further discuss our results in the context of the ‘over-the-barrier’ proton hopping mechanism, which distinguishes them from the common pro-ton hopping mechanism across water. The use of cheap proton-conducting free-standing protein mats opens new possibilities for various types of applications including those in the emergent field of bioelectronics where biocompatible materials capable of transducing ion and electron currents are required.
published_date	2016-02-03T03:42:17Z
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score	11.036706

Long-Range Proton Conduction across Free-Standing Serum Albumin Mats

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